I would try them and see how they run in your gun. Some brands have a slightly longer overall length and don't feed well. But you don't know until you try them. Typically I think the grain listed in the manual is what the gun was basically sighted in for from the factory. As an example, my OSS 9mm has a 124 grain recommendation in the manual. I usually shoot 115grain in it and it shoots to point of aim pretty well.